high
7.5
CWE
200
Advisory Published
Updated

CVE-2021-20594: Infoleak

First published: Fri Aug 06 2021(Updated: )

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions "26" and prior and Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU all versions allows a remote unauthenticated attacker to acquire legitimate user names registered in the module via brute-force attack on user names.

Credit: Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp

Affected SoftwareAffected VersionHow to fix
Mitsubishielectric R08sfcpu Firmware
Mitsubishielectric R08sfcpu
Mitsubishielectric R16sfcpu Firmware
Mitsubishielectric R16sfcpu
Mitsubishielectric R32sfcpu Firmware
Mitsubishielectric R32sfcpu
Mitsubishielectric R120sfcpu Firmware
Mitsubishielectric R120sfcpu
Mitsubishielectric R08psfcpu Firmware
Mitsubishielectric R08psfcpu
Mitsubishielectric R16psfcpu Firmware
Mitsubishielectric R16psfcpu
Mitsubishielectric R32psfcpu Firmware
Mitsubishielectric R32psfcpu
Mitsubishielectric R120psfcpu Firmware
Mitsubishielectric R120psfcpu
All of
Mitsubishielectric R08sfcpu
Mitsubishielectric R08sfcpu Firmware
All of
Mitsubishielectric R16sfcpu
Mitsubishielectric R16sfcpu Firmware
All of
Mitsubishielectric R32sfcpu
Mitsubishielectric R32sfcpu Firmware
All of
Mitsubishielectric R120sfcpu
Mitsubishielectric R120sfcpu Firmware
All of
Mitsubishielectric R08psfcpu
Mitsubishielectric R08psfcpu Firmware
All of
Mitsubishielectric R16psfcpu
Mitsubishielectric R16psfcpu Firmware
All of
Mitsubishielectric R32psfcpu
Mitsubishielectric R32psfcpu Firmware
All of
Mitsubishielectric R120psfcpu
Mitsubishielectric R120psfcpu Firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-20594?

    The severity of CVE-2021-20594 is high with a CVSS score of 7.5.

  • What is CVE-2021-20594?

    CVE-2021-20594 is a vulnerability that allows unauthorized actors to access sensitive information in certain firmware versions of Mitsubishi Electric MELSEC iQ-R series Safety CPU modules and SIL2 Process CPU modules.

  • Which software versions are affected by CVE-2021-20594?

    CVE-2021-20594 affects Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions "26" and prior, as well as Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU all versions.

  • How can I fix the vulnerability CVE-2021-20594?

    Mitsubishi Electric has released a firmware update to address the vulnerability. Users are advised to update to the latest available firmware version.

  • Where can I find more information about CVE-2021-20594?

    More information about CVE-2021-20594 can be found on the official Mitsubishi Electric PSIRT webpage, as well as the JVN and CISA websites.

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